Effects of Nano-Al2O3p on Hot Corrosion Resistance of NiCoCrAlY Cladded Coatings

H.Y. Wang; Dun Wen Zuo; X.F. Li; M.D. Wang; Y.P. Yu; X.M. Yuan

doi:10.4028/www.scientific.net/AMR.670.65

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 670Effects of Nano-Al2O3p on Hot Corrosion Resistance...

Effects of Nano-Al₂O₃p on Hot Corrosion Resistance of NiCoCrAlY Cladded Coatings

Abstract:

Three NiCoCrAlY cladded coatings reinforced by different contents of nano- Al2O3p and one without nano-Al2O3p were prepared on a Ni-base super alloy using laser cladding technique. Hot corrosion of the NiCoCrAlY coatings in Na2SO4/K2SO4 (75:25, wt. /wt.) mixture was performed at 1050 °C in static air. The effects and influencing mechanism of nano-Al2O3p on the hot corrosion behavior of the coatings were discussed. Results indicate that the hot corrosion resistance of the coatings with nano-Al2O3p is better than that of the one without nano-Al2O3p, among which the one with 1.0 wt. % nano-Al2O3p presented the best hot corrosion resistance. The improvement of the hot corrosion resistance is largely due to the refinement of the microstructure after adding nano-Al2O3p.

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Periodical:

Advanced Materials Research (Volume 670)

Pages:

65-69

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.670.65

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Online since:

March 2013

Authors:

H.Y. Wang, Dun Wen Zuo, X.F. Li, M.D. Wang, Y.P. Yu, X.M. Yuan

Keywords:

Hot Corrosion, Nano-Al₂O₃p, NiCoCrAlY Coatings, Resistance

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